FISHES, ETC. OF THE ‘NASSAU’ VOYAGE. 493 
20. OCYPODA RHOMBEA, Fabr. 
This crab is common on the sandy beach outside the harbour of Rio de Janeiro, but is 
exceedingly difficult to capture, on account of the speed with which it runs on the ap- 
proach of the enemy. On one occasion, when, I suppose, I must have seen thirty or forty 
individuals, I only succeeded in obtaining a single one, and that with the assistance of 
two friends. The animal is generally to be found resting on the sand, about ten yards 
above the edge of the water, and, on becoming aware, at a considerable distance, of the 
danger with which it is menaced, rushes down into the surf, where it is impossible to 
capture it. 
21. SESARMA ANGUSTIPES, Dana. 
A specimen of this crab was taken at Rio de Janeiro in July 1867. 
22. GONIOGRAPSUS INNOTATUS, Dana. 
Taken with the preceding, at Rio de Janeiro in July 1867. 
23. CYRTOGRAPSUS ANGULATUS, Dana. 
A crab which I have little doubt in referring to this species is very plentiful in the 
rock-pools in the vicinity of Monte Video. Dana's specimen was taken at the mouth of 
the Rio Negro, the north-eastern boundary of Patagonia. 
24. CYCLOGRAPSUS CINEREUS, Dana. 
This species was taken at Lota (Bay of Arauco). 
25. GRAPSUS PLANIFRONS, Dana. 
This crab is not uncommon among the rocks at the entrance of the Bay of Coquimbo. 
It is very fierce, and difficult to dislodge from the clefts in which it is generally to be 
found ensconced. 
26. PLANES MINUTUS, Fabr. 
This long-known species was taken with Scyllea pelagica and other animals on Sar- 
gassum, to the south of the Azores. 
27. HEPATUS CHILIENSIS, Edw. 
This handsome crab is not uncommon in the Bay of Coquimbo, where a fine specimen 
was taken. 
28. HEPATUS ANGUSTATUS, Fabr. | 
Many specimens of this species were found on the beach of Five-fathom Bay, Rio de 
Janeiro, in October 1867. 
29. PLATYMERA GAUDICHAUDIT, Edw. 
Fine speeimens of this remarkable crab were obtained from fishermen in the Bay of 
Coquimbo in August 1868. : 
